1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kamila [148]
3 years ago
7

Suppose an astronaut can jump vertically with an initial velocity of 5 m/s. The time that it takes him to touch the ground is gi

ven by the equation 0 = 5t - 0.5at2. The time t is in seconds and the acceleration due to gravity a is in m/s2. How long will it take him to reach the ground if he jumps on Earth where a = 9.8 m/s2?
Mathematics
1 answer:
Vitek1552 [10]3 years ago
3 0

Answer:

t=1.020s

Step-by-step explanation:

Given Equation:

5t-0.5at^{2} =0

Actually the given equation is the 2nd equation of motion

i.e. S =V_{i} t+0.5at^{2}

where S=0 because the astronaut jumps on the earth

and initial velocity V_{i}=5

to find time t, put the given value of a=9.8m/s^{2} in the given equation, we get

5t-0.5(9.8)t^{2} =0\\t(5-4.9t)=0\\ \ dividing\ both\ sides\ by\ t\ we \ get\\ 5-4.9t=0\\4.9t=5\\t=\frac{5}{4.9}\\ t=1.020s

it will take t=1.020s to reach the ground if he jumps on the Earth

You might be interested in
8(x + 7) - 12 = 0 can you solve the following inverse <br>​
vampirchik [111]

Answer:-11/2

Step-by-step explanation:

7 0
3 years ago
Time sensitive mark best as brainiest
ycow [4]

Answer:

4986 ounces/m³

Step-by-step explanation:

1 kilogram = 35.274 ounces

1 cubic foot = 0.0283 cubic metre

We are converting kg/ft³ to ounces/m³

Hence:

4kg/ft³ × 35.274 ounces/ 1 kg × 1 ft³/0.0283m³

= 4985.7243816 ounces/m³

Approximately to the nearest whole number = 4986 ounces/m³

6 0
3 years ago
In the parrallelogram, find y.
Nutka1998 [239]

Answer: I think it’s b which is also 5

Step-by-step explanation:

In the link

if I did it wrong someone pls correct me

4 0
3 years ago
Casey ordered 4 pizzas.Each one was cut into 6 equal slices.Her father ate 3 slices.What fraction of the pizza was left?Write th
Fittoniya [83]
Total slices=4*6=24. Take away 3 slices leaving 21=18+3=3 pizzas and ½ a pizza, 3½.
3 0
3 years ago
Solve -5x2 - 20x + 35 = 30 by completing the square.
Semenov [28]

Answer:

x=−2−√5 or x=−2+√5

Step-by-step explanation:

-5x2 - 20x + 35 = 30

Answer = x=−2−√5 or x=−2+√5

5 0
3 years ago
Other questions:
  • Which property justifies this statement? If 4x=20, then x=5. Division Property of Equality Reflexive Property of Equality Substi
    6·2 answers
  • what is equivalent to −3.5(2 − 3n) − 2.5n? A. −7 − 8n B. −7 + 8n C. −7 − 13n D. −7 − n(10.5 − 2.5) E. −7 + n(10.5 − 2.5)
    15·1 answer
  • 8.235×10 to the power of -4 scientific notation
    9·1 answer
  • What is 100 over 90 times 81 - 9
    7·1 answer
  • Equation for a parabola with a focus of (2, -2) and a directrix of y=-8
    5·2 answers
  • Simplify each of the following powers of i.<br> i^99
    13·2 answers
  • Find the domain of this equation {-2
    10·1 answer
  • A number sequence has nth term 6n + 3 (a) Write down the first four terms of this sequence.  1st term ..............., 2nd term
    12·2 answers
  • 7:<br> m23 = (15x +22)", mZ1 = (19x – 10)°,<br> X=8
    11·1 answer
  • A study showed that the ratio of the number of people who get their news from social media to the number of people who their new
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!